Finding Amount of Orange Juice in a Juice Mixture

Sarah and Tom are making fruit juice. Sarah uses a ratio of 2 parts orange juice to 3 parts apple juice. Tom wants to create a mixture with the same ratio but using 10 liters of the total juice. How many liters of orange juice does Tom need to use?

To find this, set up a proportion based on the ratio. Let $x$ be the amount of orange juice Tom will use at the ratio of 2:3, which means for every 2 parts of orange juice there are 3 parts of apple juice.